Hypericum lloydii |
Hypericum dolabriforme |
|
---|---|---|
sandhill St. Johnswort |
straggling St. John's-wort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Subshrubs, decumbent and woody (not rooting) at base, branching at base or throughout, 1.5–5 dm, bark thin. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes 4-lined at first, then 2-lined to terete. |
Leaf | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
blades linear-elliptic or linear-oblong to linear, 20–35 × 3–5 mm (main stem), base not articulated, narrowly cuneate to rounded, margins recurved to revolute, apex obtuse to acute, midrib unbranched. |
Inflorescences | narrowly pyramidal, 1–3-flowered, with 1–3(–5)-flowered dichasia from to 5 proximal nodes, without additional flowering branches; pedicels 0.5 mm. |
obconic, (1–)3–20-flowered, ± widely branched, sometimes with single flowers at immediately proximal nodes. |
Flowers | 12–14 mm diam.; sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–7 × 0.5–0.8 mm; petals 5, golden yellow, oblanceolate-oblong, 5–7.5 mm; stamens deciduous, 100; ovary 3-merous. |
15–20 mm diam.; sepals persistent, not enclosing capsule, 5, ovate-lanceolate to lanceolate, ± foliaceous, unequal, 5–8(–15) × 2–3(–8)mm; petals 5, yellow, curved-dolabriform, 10–13 mm; stamens deciduous, 120–200; ovary 3-merous. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
ovoid-conic, rostrate, 4–9 × 3–4 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
carinate, 1.5–1.8 mm; testa reticulate-scalariform. |
2n | = 18. |
|
Hypericum lloydii |
Hypericum dolabriforme |
|
Phenology | Flowering summer (Aug). | Flowering summer (Jun–Sep). |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Limestone outcrops, cedar glades, dry, rocky stream beds |
Elevation | 100–300 m (300–1000 ft) | 0–500 m (0–1600 ft) |
Distribution |
AL; GA; NC; SC
|
CT; GA; IN; KY; TN |
Discussion | The habit, leaf shape, and drier habitats distinguish Hypericum lloydii from H. galioides. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hypericum dolabriforme is superficially similar to H. sphaerocarpum, to which W. P. Adams (1962) related it. Apart from the narrow leaves and unequal sepals, it is much nearer morphologically to H. myrtifolium (for example, in the wide-spreading inflorescence, numbers of stamens, and ovoid-conic capsules). Hypericum bissellii, described from a plant growing in Southington, Connecticut, is unlikely to be indigenous in that state. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 84. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Myriandra |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | Brathydium dolabriforme, H. bissellii, H. procumbens |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | Ventenat: Descr. Pl. Nouv., plate 45. (1801) |
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